Sound-deadening unit



P. G. PEIK SOUND-DEADENING UNIT Oct. 30, 1951 Filed April 25, 1945 INVENTOR.

B104 G/OE/K r v I ,H p u u a 1 t a e k v Arroe/wsy Patented Oct. 30, 1951 UNITED STATES PATENT OFFICE SOUND-DEADENING UNIT Application April 25, 1945, Serial No. 590,228

3 Claims. 1

This invention relates to sound-deadening or vibration-damping structures, and especiall to those comprising a layer of a setting material such as plaster or concrete and a mounting therefor, and to procedure for obtaining such structures.

Its chief objects are to provide an improved structure for insulating against passage of sound; to provide a highly non-resonant wall; to provide a structure having high sound-absorbing r vibration-damping characteristics; to provide a wall having good acoustic or non-echoing characteristics; and to provide simplicity and economy of procedure for producing a structure having some or all of these advantages.

Of the accompanying drawings:

Fig. 1 is a section of an anchoring and cushioning element adapted for incorporation in an embodiment of the invention in one of its preferred forms.

Fig. 2 is a section of an alternative type of anchoring and cushioning element.

Fig. 3 is a vertical section of a table and the work thereon illustrating diagrammatically a preferred method of associating some of the elements of the final structure.

Fig. 4 is a fragmentary vertical section of a wall structure embodying the invention in its preferred form.

Fig. 5 is a fragmentary section of a modification.

Referring to the drawings, and at first to Fig. 4, the final structure comprises a backing layer I 0, here shown as being of plaster-board material having a paper facing layer H and secured to studding I2 by nails such as the nail 13, which can be spaced widely apart by reason of the stiffness of the layer [0.

Embedded in the opposite face of the backing layer II] are dove-tail ribs I4, l4 formed on one face of an anchoring and cushioning element such as is shown in Fig. 1, which has a medial web portion l5 and dove-tail ribs l6, 16 formed on the opposite face of the web, and here shown as being in non-staggered relation to the first mentioned ribs M.

In interlocked relation to the ribs [6 is a layer of setting material ll, which can be any one of the usual types of plaster or can be a Haydite concrete, as described in my copending application Ser. No. 561,473, now Patent No. 2,542,428, issued February 20, 1951, or other composition comprising Portland cement or other suitable setting material.

The anchoring and cushioning member 14- l5|6 preferably consists of an inexpensive rubber composition having high energy absorption or hysteresis in being deformed, or at least of a material having substantially the resilient deformability of vulcanized soft-rubber, so that it will have a cushioning effect between the relatively rigid embracing layers In and ll of setting material and so that of itself it will have a natural rate of vibration widely different from that of either of the embracing layers and from that of the composite structure as a whole.

The anchoring and cushioning element l4- I5-l6 preferably is formed by extruding the stock through a die and then, either before or after it is vulcanized or otherwise caused to set, it is associated with the plaster-board backing layer 10, the latter being given suitable uniform thickness as by means of a leveling blade I8, Fig. 3A, and the facing sheet of paper ii, if desired, can be applied by means of a roller 19 as illustrated diagrammatically in Fig. 3B.

When the layers have both been set, the resulting structure, in panels of suitable size, is secured to the studding l2 or other support as by means of nails I3, after which the layer 11, which can be continuous throughout the eX- tent of a plurality of the panels, is applied as by troweling and allowed to set. I do not wholly limit my claims, however, to applying the layer I! to the underlying structure after the latter has been mounted upon the studding or other final support.

The cushioning element shown in Fig. 2 corresponds to that of Fig. 1 except that the ribs Ma, Ma on one of its faces are staggered with relation to the ribs Ilia, 15a on its other face.

Even when the nail heads, as in Fig. 4, are in contact with the layer ll, the nails can be so far apart that such contact does not greatly detract from the sound-deadening or vibrationdamping effect of the structure, the middle layer of resilient material insulating the embracing, relatively rigid layers from each other substantially throughout their extent.

More complete insulation can be had by driving the nails so far that their heads out through the rubber-like material and directly engage the backing layer 10, as in Fig. 5, the resilient material closing over the head of the nail as there shown at the line 20.

The anchoring and cushioning layer being of highly deformable material, and insulating the embracing layers of relatively rigid material from each other throughout large areas, the

3 structure provides the advantages that are set out in the above statement of objects.

I claim:

1. As an article of manufacture, a pre-fabricated, sound-deadening unit for incorporation in a housing structure, said unit comprising a thin and extensive cushioning sheet of material having substantially the resilient deformability of vulcanized soft-rubber and a thin and substantially coextensive supporting sheet of hardened plastic anchored to one of the extensive faces of the said cushioning sheet substantially throughout the extent of the two said substantially coextensive sheets, the said cushioning sheet comprising a web of generally plane form in continuity substantially throughout the extent of the two said substantially coextensive sheets and being formed, on the side of said web farthest from said supporting sheet, with anchoring projections for anchoring thereon a layer of setting material applied thereto, said unit being in the form of an unattached and manually 'manipulatable unit.

-2. An article of manufacture as defined in claim 1 in which the cushioning sheet is formed with anchoring projections of the resilient material on both of its extensive faces.

3. An article of manufacture -as defined in claim 1 in which the cushioning sheet is formed with anchoring projections of the resilient ma terial on both of its extensive faces and in which projections on one of the said faces are positioned in staggered relation to projections on the other of the said faces.

PAUL G. PEIK.

REFERENCES CI ED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 9%;02-5 Howe Dec. 8, 1908 1,115,266 Wiltse Oct. 27, 1914 1,646,598 ,Routt Oct. 25, 927 1,870,101 Davey Aug. 2, 1932 1906,63? Schulke May 2, 1933 2,139,851 Roberts Dec. 13, 1938 2,168,949 Bentz jet al. r ,r Aug. ,8, 1939 2,261,730 Mitrnan V Nov. 4, 1,941 2,323,936 Roberts July 13, 1943 2,374,186 Fischer Apr. 24, 1945 FOREIGN PATENTS Number Country Date 171,632 Switzerland of 1934 456,189 France of 1913 

